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FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) - Investment Management Services [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
U.S. Global Investors Funds [Member] |  |  |  |
FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) [Line Items] |  |  |  |
Net operating revenues | $ 1,200 | $ 713 | $ 3,200 | $ 2,200
U.S. Global ETFs [Member] |  |  |  |
FINANCIAL INFORMATION BY BUSINESS SEGMENT (Details) [Line Items] |  |  |  |
Net operating revenues | $ 5,200 | $ 201 | $ 11,100 | $ 455

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